Counter-gravity screw-propeller.



No. 727,169. t PATENTED MAY 5, 1903. y c. A. MAN-KBB..

COUNTER GRAVITY SGRBW PROPELLER.

APPLIUATIONHLHD APR. 1o, 1902. No'xonm..

. QON UNI l/ Patented'nray v5; 1903.

UNITED STATES] PATENT OFFICE.

CAREY ALANMANKER, OF PEARL, ILLINOIS.

COUNTER-GRAVITY SCREW-PROPELLER.

SPECIFICATION forming part of Letters Patent No.r 727,169, dated May 5, 1903.

Application iiled April 10, 1902.

To all whom it may concern:

Be it known that I, CAREY ALAN MANKER, a citizen of the United States, residing in Pearl, in the county of Pike and State 'of Illinois, have invented certain new and useful Improvements in Counter- Gravity Screw- Propellers, of` which the following is a full,

clear, and exact description, reference being.

had to the accompanying drawings, forming part of this specification.

My invention relates to a screw-propeller for navigation and embodying a construction by which the propeller-blades are caused to poise and counterpoise each other and act against the force of gravitation while furnishing propulsive action, so that the vesselI to which the propeller is applied not only exerts power for propulsion, but also serves .to

buoy or lift a vessel and sustain it in order that the displacement and resistance of the medium through which the vessel is passing will be materially reduced owing to the decrease in the action of the inertia of the wa-l ter against the vessel. To obtain the desired result,1I so construct the propeller that itsl for sustaining eect against the impingingv medium beneath them.

The invention Aconsists in features of novelty hereinafter fully described, and pointed out in the claims.

Figure I is a vertical longitudinal section of my propeller. Fig.' II is a vertical 'crosssection taken online Il II, Fig. I. Fig. III is a View of thepropelle'r-blade;actuating crank-shaft gearing. FigJlV is a view. showing the propeller-blade-actuating crank-shaft and one of the blade-rockers in cross-section and one of the r0ckerarms and bearingboxes fitted to said crank. Fig. V is a crosssection taken on line VV, Fig. IV. Fig. VI

seriairbfloaezfr. dimmi.)

is a bottom View of the propeller-runner and propeller.

1 designates the lower end of a hanger by which the propeller is sustained.

2 designates the runner of the propeller, which tapersforwardly from the hanger 1 in wedge shape, as seen in Fig. VI, so that it .will offer the least resistance to the medium through which it passes. The runnerl2 is secured to the hanger bya series of screw-rods 3, one of whichi's shown in FigrI,

Y 4 designates a bearing member set into the rear end ofthe runner 2 beneath the hanger 1 and held to said runner by one or more retaining-screws 5. The bearing member 4 is provided witha rim 6 and carries a stem 7,

vpositioned centrally of said rim. The rim 6 is completed at the top by an extension ltzof the hangerl. y

8 is a bushing seated in the'rim Gand held therein by retaining-'screws 9.

10 designates a power-shaft which extends downwardly vthrough the hanger` 1 and to which power may bei applied by a suitable motor. Fixed'to the lower end of 'the shaft 10 is a beveled pinion 11, positioned in a recess-12 inthe bearing member 4.

13 designates a rotatable barrel that is loosely fitted to thebearing-member stem 7 and is journaled in theA bushing 8. The in- -ner end of this barrel is provided with a'beveled gear 14:, that is` arranged in mesh with the beveled pinion on the power-shaft 10.

15 designates a crank-shaft extending longitudinallythrough the bearing member Il and-throughlthe'stem 7 of said member in a .position eccentric to the centerofsaid stem.L

15' is the crank-arm of saidv shaft.

16v designates avseries of rockers loosely mounted .in thebarrel 13 and extending longitudinallyx thereof. Each of the rockers 16 carries a propeller-blade 17.

18 designates arms fixed to thel rockers 16 and provided with longitudinal apertures 19, in each of which the arm 15 of the crank-arm 15 is adapted to operate.

2O designates flanged slide-boxes itted in the longitudinal apertures of the rocker-arm 18 (see Figs. 1V and V) and in which the crank-arms are journaled, each slide-box being provided with an oil-well 21, (see Fig. V,) from which lubricant is supplied to the bear- IOO ings of the crank-arms on introduction therethe worm 24 to turn the gear-wheel 23 and impart rotation to the crank-shaft 15.

26 is an oil-well in the barrel 13, that is This well is adapted to receive lubricant to be supplied to the inner closed by a plug 27.

and outer surfaces of the barrel 13 where it contacts with the bearing-member stem 7 and bushing 8.

In the practical use of my propeller they parts are operated as follows: Upon rotation of the power-shaft 10 the beveled pinion 11 is rotated to impart rotation to the barrel 13 through the medium of the intermeshing beveled gear 14, carried by said barrel. By this means the propeller blades are rotatably moved in the medium through which they are traveling. The crank-shaft 15, which is vthe prime factor in obtaining the counterpoising action of the propeller-blades, is actuated through the medium of rotation of the turnrod 25, which causes the worm 24 to rotate the gear wheel 23, and consequently the crank-shaft. The turn-rod maybe actuated in any desirable manner. Upon rotation of the crank-shaft its arm 15', having journal connection with the arms 18 of the rockers 16, causes said arms to be rocked and by their rocking swing the propeller-blades into varying positions with relation to each other. By this arrangement I provide for an accelerated speed of the blades at one horizontal side .of the propeller-barrel, while the arm ot' the crank-shaft is traveling upwardly at the opposite side and thereby exerting an increased leverage upon the corresponding arm 18 of the descending propeller-blade. At the same time the crank-shaft arm being -closer to the rocker 16 or axis of the ascending propeller-blade has decreased leverage upon the arm 18 of said blade, thereby causing the ascending blade to be held back and its :speed diminished in the same ratio as the corresponding descending blade'is forced 'dow-nwardly or forwardly with accelerated speed. It Will be seen that I therefore acquire a couuterpoise action of the descending and ascending blades in impingement against the Yand respectively mounted in said rocker-arms,

substantially as set forth.

2. The combination in ya propeller, of propeller-blades, means in which said blades are swingingly supported, arms carried by said blades, bearing-boxes reciprocally mounted in -said arms, a crank-shaft having an arm positioned in said bearing-boxes, and means for rotating said crank-shaft, substantially as and for the purpose set forth.

3. The combination in a propeller, of abearing member, a stem carried by said bearing member, a bushing seated in said bearing member, a barrel arranged in said bushing, means for rotating -said barrel, propellerblades swingingly mounted in said barrel,

and means whereby said propeller-blades are caused to travel Withaccelerated speed during the downward strokes, substantially as set forth.

4. Thecombination in apropeller, of abearing member, a stem carried by ysaid bearing member, a bushing seated in said bearing member, a barrel arranged in said bushing, means for rotating said barrel, propellerblades swingingly-mounted in said barrel, a crank-shaft provided with arms and extending through saidbearing-member stem eccentrically to its transverse center, arms carried bysaid blades and Vbearing-boxes reciprocally mounted in said blade-arms in which said crank-shaft arm is positioned, substantially as set forth.

In testimony whereof I have signed my name to this specication, as Well-as to the drawings herewith, in the presence of two subscribing Witnesses.

CAREY ALAN MANKER.

y .Witnesses:

A. M. APPLEGATE, JNO. J. KNOX.

kT GH 

